Want to know what’s coming on The Big Bang Theoryseason 12 episode 15? Well, a recent Leonard – Penny story is going to take center stage.

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It was first earlier this season when Leonard decided that he wanted to do what he could in order to help out Zack and his wife Marissa by being a sperm donor for them. This is obviously a move that can be life-changing for many, especially since Leonard and Penny don’t have any kids of their own just yet. This may cause Penny to think in a very specific way about this decision of his, and that in turn may be a crux for some of the story that is coming up next. As it turns out, she may do whatever she can in order to sabotage his attempts to help Zack.

Want to get some more news regarding what’s coming up next? Then be sure to check out the official The Big Bang Theory season 12 episode 15 synopsis below for more:

So why is Wyatt coming back for this particular episode? That’s a great question to wonder, largely due to the fact that it doesn’t seem necessary that connected to anything else. It’s also surprising that the show has been able to get Carradine back given that he’s been so busy as of late working on Madam Secretary. We do hope that there are some opportunities to see some other familiar faces and family members throughout the rest of the season. They’re the foundation for the show and a part of the reason why we care about the world so much. There are still many more stories coming up and we’re excited to see what ideas the team has in store from here!